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← GeographyWhich thermocline response occurs when sustained offshore winds induce coastal upwelling?
A)Shallower thermocline upward, nutrient increase✓
B)Deeper thermocline downward, decreased salinity
C)Thermocline stratification reduction nearshore
D)Increased mixed layer depth uniform profile
💡 Explanation
Coastal upwelling brings deep, cold, nutrient-rich water to the surface, because Ekman transport moves surface water offshore, therefore a shallower thermocline elevates due to the upward movement, rather than deepening where the thermocline would sink when downwelling dominates.
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